GB2423678B - Apparatus for reducing frequency offset of an oscillator in a mobile communication device - Google Patents

Apparatus for reducing frequency offset of an oscillator in a mobile communication device

Info

Publication number
GB2423678B
GB2423678B GB0609072A GB0609072A GB2423678B GB 2423678 B GB2423678 B GB 2423678B GB 0609072 A GB0609072 A GB 0609072A GB 0609072 A GB0609072 A GB 0609072A GB 2423678 B GB2423678 B GB 2423678B
Authority
GB
United Kingdom
Prior art keywords
oscillator
communication device
mobile communication
frequency offset
reducing frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0609072A
Other versions
GB0609072D0 (en
GB2423678A (en
Inventor
Richard Ormson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Technologies UK Ltd
Original Assignee
NEC Technologies UK Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Technologies UK Ltd filed Critical NEC Technologies UK Ltd
Publication of GB0609072D0 publication Critical patent/GB0609072D0/en
Publication of GB2423678A publication Critical patent/GB2423678A/en
Application granted granted Critical
Publication of GB2423678B publication Critical patent/GB2423678B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
    • H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control
    • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • H03L7/14—Details of the phase-locked loop for assuring constant frequency when supply or correction voltages fail or are interrupted
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L1/00—Stabilisation of generator output against variations of physical values, e.g. power supply
    • H03L1/02—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only
    • H03L1/028—Stabilisation of generator output against variations of physical values, e.g. power supply against variations of temperature only of generators comprising piezoelectric resonators

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
GB0609072A 2004-03-10 2004-03-10 Apparatus for reducing frequency offset of an oscillator in a mobile communication device Expired - Fee Related GB2423678B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0405393A GB2412037B (en) 2004-03-10 2004-03-10 Apparatus for deriving the frequency offset due to aging of a crystal oscillator

Publications (3)

Publication Number Publication Date
GB0609072D0 GB0609072D0 (en) 2006-06-21
GB2423678A GB2423678A (en) 2006-08-30
GB2423678B true GB2423678B (en) 2007-02-07

Family

ID=32117410

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0609072A Expired - Fee Related GB2423678B (en) 2004-03-10 2004-03-10 Apparatus for reducing frequency offset of an oscillator in a mobile communication device
GB0405393A Expired - Fee Related GB2412037B (en) 2004-03-10 2004-03-10 Apparatus for deriving the frequency offset due to aging of a crystal oscillator

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0405393A Expired - Fee Related GB2412037B (en) 2004-03-10 2004-03-10 Apparatus for deriving the frequency offset due to aging of a crystal oscillator

Country Status (1)

Country Link
GB (2) GB2423678B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7649426B2 (en) * 2006-09-12 2010-01-19 Cts Corporation Apparatus and method for temperature compensation of crystal oscillators
GB2450680B (en) * 2007-06-22 2012-05-30 Ubiquisys Ltd Controlling timing of synchronization updates
GB2564406B (en) * 2017-07-06 2022-09-07 Focal Point Positioning Ltd Method and system for correcting the frequency or phase of a local signal generated using a local oscillator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483090A1 (en) * 1990-10-26 1992-04-29 Ericsson Inc. Digital radio frequency compensation
WO1996024986A1 (en) * 1995-02-10 1996-08-15 Matsushita Communication Industrial Corporation Of America Crystal oscillator with automatic compensation for aging and temperature
GB2335554A (en) * 1998-03-18 1999-09-22 Roke Manor Research Radio synchronisation system
WO2002093748A1 (en) * 2001-05-16 2002-11-21 Kyocera Wireless Corporation Reference oscillator with automatic compensation for aging and temperature
GB2393594A (en) * 2002-09-24 2004-03-31 Nec Technologies Mobile handset clock correction
EP1458098A2 (en) * 2003-03-12 2004-09-15 Nec Corporation Frequency correction method and apparatus for correcting changes due to ageing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL120119A0 (en) * 1997-01-31 1997-04-15 Binder Yehuda Method and system for calibrating a crystal oscillator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0483090A1 (en) * 1990-10-26 1992-04-29 Ericsson Inc. Digital radio frequency compensation
WO1996024986A1 (en) * 1995-02-10 1996-08-15 Matsushita Communication Industrial Corporation Of America Crystal oscillator with automatic compensation for aging and temperature
GB2335554A (en) * 1998-03-18 1999-09-22 Roke Manor Research Radio synchronisation system
WO2002093748A1 (en) * 2001-05-16 2002-11-21 Kyocera Wireless Corporation Reference oscillator with automatic compensation for aging and temperature
GB2393594A (en) * 2002-09-24 2004-03-31 Nec Technologies Mobile handset clock correction
EP1458098A2 (en) * 2003-03-12 2004-09-15 Nec Corporation Frequency correction method and apparatus for correcting changes due to ageing

Also Published As

Publication number Publication date
GB2412037B (en) 2006-12-06
GB0405393D0 (en) 2004-04-21
GB0609072D0 (en) 2006-06-21
GB2412037A (en) 2005-09-14
GB2423678A (en) 2006-08-30

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20090310